hi,

assumption #1.-  this is a through hole solder joint.
assumption #2.-  this ring is on the 'top' side
assumption #3.-  the connector leads are solderable
assumption #4.-  the flux wetted the top-side pad and the lead.
assumption #5.-  you are using a wave solder machine to make this solder joint

sounds like you haven't gotten enough preheat and/or the belt speed is too slow.  if the assumptions aren't correct, disregard this email.

phil

-----Original Message-----
From: Jean-Francois Bissonnette [mailto:[log in to unmask]]
Sent: Thursday, April 20, 2000 3:29 PM
To: [log in to unmask]
Subject: [TN] Solder fillet problem


Hi All!

Probably too late to ask but I need some input for this
weard problem.

I got some connector with big leads that, with the unaided
eye looks properly soldered.  But if I look at it with the
microscope at 10X, it looks like the fillet does not realy
stick to the lead.  The fillet end rather abrubtly (makes a
rign) and it looks like there was no fusion between the lead
and the solder.  I hope my explanation is clear enough!!!

JF

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